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Titolo:
THE ENERGETICS OF RUNNING AND RUNNING SHOES
Autore:
SHORTEN MR;
Indirizzi:
2835 SE TOLMAN ST PORTLAND OR 97202
Titolo Testata:
Journal of biomechanics
, volume: 26, anno: 1993, supplemento:, 1
pagine: 41 - 51
SICI:
0021-9290(1993)26:<41:TEORAR>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRETCH-SHORTENING CYCLE; ELECTRO-MECHANICAL DELAY; HUMAN SKELETAL-MUSCLE; ELASTIC ENERGY; HUMAN FOOT; POTENTIATION; CONTRACTIONS; MOVEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
M.R. Shorten, "THE ENERGETICS OF RUNNING AND RUNNING SHOES", Journal of biomechanics, 26, 1993, pp. 41-51

Abstract

It has been suggested that elastic energy storage and recovery in thecushioning system of an athletic shoe ('energy return') is a desirable quality that can enhance performance. However, comparing the energetics of a running shoe cushioning system with other passive energy exchange mechanisms in the running athlete suggests that the potential benefits of energy return are limited. The energetics of running shoe cushioning systems have been studied using a multiple-element, non-linearviscoelastic model to analyse the effect on the shoe of plantar pressure distributions recorded in vivo. The running shoe is a net dissipator of energy but small quantities of strain energy, of the order of 10J, are stored and recovered during a running step. The actual energy exchanges depend on the cushioning material properties and the runner'splantar pressure distribution. Energy storage and recovery occurs throughout the step in different regions of the shoe midsole. Energy dissipation is confined almost entirely, both spatially and temporally, tothe impact phase of ground contact. Thus the proportion of input energy recovered from the shoe is higher than that predicted by mechanicaltests which simulate only the impact phase of the step. Energy storage and recovery in the model shoe are large enough to have local effects on the energetics of the foot and lower leg but modest when comparedwith passive energy transfer within and between body segments or strain energy storage and recovery in the the lower limb. Similarly, differences in the energy dissipated by well-designed shoes are predicted to be small and unlikely to have a direct effect on the energetics of the body as a whole. The possibility of indirect, kinematically mediated effects remains open, however.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 10:29:47